Pump



Mar. 6, 1923.

C. J. LANDIN PUMP Filed Jah, ,4, 1921 Patented Mar. 6, 1923,

PATENT foi-rica CARL J'. LNDIN, 0F BOSTON', MASSACHUSETTS.

PUMP.

Application led January 4, 1921. Serial No. 434,954.

To all whom t may concern:

Be it known that I, CARL J. LANDIN, a citizen of the United States, and resident of Boston, county of Suffolk, State of'Massachusetts, have invented an Improvementin Pumps, of which the following description,

in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

AThis .invention relates to pumps and particularly t-oY hand pumps such as are used for pumping up automobile tires, although the invention is applicable to hand pumps designed for other uses.

One of the objects of my inventionV is to provide an improved hand pump which is constructed so that the handle and other projecting parts can be folded into parallelism with the pump cylinder thus reducing ma- 20 terially the amount of space required for 'storing the pump away.

In order to give an understanding of my invention 'I have illustrated in the drawings a selected embodiment thereof which will` now be described after which the novel features will be pointed out in the appended claims.v 1

f Inv the drawings:

Fig. 1 is a side view of a pump embodying my invention.

Fifg. 2 is a top plan view of theV pump h-andle. i

Fig. 3 is a section taken on the line 3 3,

Fig. 2.

Fig. 1 is a section on the line 4.-4, Fig. 8. Fig. 5 is a sectional view through the lower end of the cylinder, said view showing the piston in section.

Fig. e is a sea-ion @n the une s+-aria. 5f`

40 Fig. 7 'is af fragmentary view 4showing a head,- the lower end of the pump cylinder partly in section;v

'.Fig.' 8 is a perspective Vview of the head at the upper end of the piston rod; Fig. 9 i5 a perspective view of the folding foot piece. y f

My improved pump is of the well known type which Acomprises a cylinder 1 havinga piston 2 therein to which is connected a piston rod 3 that extends through the head 4t of the cylinder' and has a handle secured thereto. The cylinder has at its lower end ahead or block 5to which Vthe delivery pipe 6 is at-f tached` said pipe conmiunicating with the lower end of the cylinder through a suitable passage formed in the block 5.

The parts as thus far described are, or may be, all as usual in any hand pumps 0f this nature and form no part of my present invention. i

One of the features of my invention relates to the handle at the upper end of the piston rod 3 and by which the pump is operated. In my invention this ,handle is a foldable handle so that -when the pump is not inuse the handle may be folded into parallelism with the cylinder thus reducing materially. the space required to store' the ump.

It is lwithin my invention to make the handle a foldable one inv a variety of ways. I prefer.,v however, the construction herein shown wherein the handle is made in two sections each of which is pivoted to a head at the upper end of the piston rod, means being provided toV lock the handle sections either in their operative position or in their folded position.

The two handle sections are indicated at 7 and 8 respectively and these are pivotally connected to a head 9 secured to the upper end of the piston rod 3. The head 9 is disk shaped and is provided on each side with a rib 10,' said ribs being herein shown asextending vertically. Each handle section `7 and 8 is'formed at its inner end with a disklike portion 11 which corresponds in size to the disk-like head 9 each head 11 being formed on its inner face with a groove 12 which tits the ribilO. The handle sections 7 and 8 are pivoted to the head 9 so that they can be swung from their operative position shown in full lines Fig. `1 into the position shown' in'fdotted 4lines Fig. '1 and they are clamped in either of these two'positions by means `of a'clamping bolt l'which also constitutes the pivot for said handle sections. This'clamping bolt 13 extends through one ofthe heads -11. through the head 9 and screw threadsi'n'to'a boss 14 formed on the other 4head 11. The clamping bolt 13 is provided with a knnrledthumb piece 1-5' by which it may be turned. The grooves 12 in the handle sections areso placed that when the handle sections are in their operative horizontal position shown in Fig. 1 said grooves receive the ribs l() on the head 9 and if the clamping bolt 15S tightened when the handle sections are in this position they thus making a rigid handle by which the pump may beoperated. Vhenit is desired to told the handle sections the clamping bolt 13 is loosened suiiiciently to permit thefhandle'sections to be swung` down into the dot'- ted line position Fig. 1 and when in this po-.. sition the clamping bolt 13 may be again tightened so as to hold themin'their foldedrelation. If desired the head 11 of each hanvdie section may have lanother groove 16- therein which receives the; rib 10 when the handle sections are folded'.`

I havefherein shown the knurled thumbpiece 15 asbeing cup shaped and I have provided a spring 17 within said head which is normally held under compression.

The advantage of the spring is that' when the clamping bolt is loosened the spring, will tend-to hold the parts from movement rela-- tivetoteachother until soine vforce is applied to the handlesections to either fold them or swing -themf into their operative position.

Pumps of this type are commonly pro# videdwith either a stirrup at their lower endor a foot piece yon which the operatorplaces his foot when the pump is being,y used.V Inforder to provide a lpump whichy can be stored in a minimum space I'vproposejto inakelthe pump with a folding f'oot piecewhich can be folded into parallelism with-.the cylinderwhen the punipis not in use. My improved foot piece is shownV at 18 and itis provided at itsinner end with Athe lateral extension 19 which is received within a recess 20 formed'in `the bloclf5; The yfoot` piece 18 is pivotally` connected to the blockiby means ofa pivot pin 21 which extends through the extension 19 and is sustained at its'ends inithc sidewalls 22 lof the recess 20.V lith this construction the 'foot' piece can be placed in the full line position Fig, 1, which is its operativefposition Orcanbe foldedI into parallelism with the cylinder as-shown in dotted lines Fig. 1. Then the foot' plece is in its: operative position the wall 231ottlie'iextensionY 19`rests against the wall 24er they recess 20, thusassisting in holding the pumpiirmly in its vertical position1- I have providedl hereinnovelfineans for vie-ldinglyholding the foot piece in either its operative position .shown in full lines, Fig; 1f or-i1`i its folded position shown in dottedlines Fig. 1'.' F ort-his purpose the extension 19 isjformediat one end with a locking projection 25 that is adapted to 'be received# in` either one o'fltwo recesses 26 or 27 Jformed. in one ofthe side walls 22 of the recess 20. The projection and rthe recesses 26 and 27 have a corresponding shape. A spring device is provided 'for yieldingly holding the projection 25 .in

either recess 26 or 27 While peri'nitting said projection to move out of either recess as the foot piece .isfturned about its j :i'veta This spring device is shown asacoil spring 28-which is situated within the extension construction the footpiece can be readily turned from the full vtothefdotted 'lineposition and Vwhen it is in the full line-posi tion the projection 25 will* occupy the depression orrecess-26 while whenit is in the dotted vline positionsai-dprojection will occupy the recess or depression-27.

The piston which If employ is ofthelfcupwasher type and I have provided: novel means for always maintaining a proper conta-ctbetween said wash'erand the walls of' thecylinder; The cup-washer ofithe pisa tongis indicated at 31 and-it is backed by a inetalwasher that is carried b; the: pistonl rodlas usual. Said piston roc also has another metalwasher 33 thereon situ ated within the cupped-washer- 31. In`mypresent inventions*Ifprovide a third washer lhwhielr is securedto the end of the piston rodibya suitable screw 35 and I employ a spacingfcollar 86 between thewashers 233i and 311.- Situated withinV the flange. portion 3T of the cup-washer is an annular membery 38` of leather or some othermaterial which is capableofrenpanding and situated within this annular member 38 is a spring-device whichi tends to expand it outwardlyinto contact with the flange 37. This spring devicemayA convenientlyl be in thetfor'm. off a spiral spring 39. The spring 39 acts through the expansiblei ring for -meinberf 38A to maintain the-flange 37 off the cup-washerl in pivoted tosaid head and having grooves to receiif'e said ribswhen said handle sections are/iu operative.position, said handle sections being foldable into va position in' parallelism with the pistonA rod, and means to lock said handle sections in their operative position. f

2. In a pump the combination with a cylinder, a pistontherein and a piston rod, of a head at the end of the piston rod provided With a rib on each side, vtvvo handle sections pivoted to said head and having grooves to receive said ribs when said handle sections are in operative position, `said handle sections being foldable into a posi- 10 tion in parallelism with the piston rod, and a clamping bolt vextending transversely through said handle sections and head and by which the handle sections are looked in their operative position.

In testimony whereof, I have signed my name to this Specification.

CARL J. LANDIN. 

